Which frequency in the medium frequency band is used for distress and safety traffic by radiotelephony?
A. 518 kHz.
B. 2, 182 kHz
C. 2, 614 kHz
D. 6,090 kHz.
查看答案
When a coast station receives a distress alert on DSC equipment, she should__________.
A. acknowledge it within 2 minutes 45 seconds
B. acknowledge it within 3 minutes
C. broadcast in NAVTEX service
D. ignore it
The address of acknowledgements of DSC alert should be____________.
A. MMSI of the ship in distress
B. MMSI of the ship (coast) station, who receives the alert
C. to all ships
D. to RCC concerned
How many blips appeared on the screen of SART-detecting radar?
A. 6
B. 8
C. 12
D. At least 12
Who can impose silence on stations which interfere with distress traffic?
A. The Personal Radio Communications Branch of the ITU.
B. A radio operator trying to make a phone patch on company official business.
C. A ship looking for navigational information.
D. The administration concerned or coordinator involved in the handling of the emergency traffic.
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